CNC Machined Brass Front Upper Arm Mount (Black) Traxxas TRX-4M Mini Crawler Nylon lock nuts secure the

Nylon lock nuts secure the hinge pin and helps prevent the pin from ever coming loose or backing out

these ST Racing hinge pins are polished and ultra smooth

These hex adapters are +1mm off-set to give your RX-4M a slightly wider stance for stability and extra weight with the hex help improve control of wheel speed

The ST Racing Concepts Traxxas Bandit Polished Steel Rear Outer Hinge Pin Set is made from CNC Machined high-quality steel and heat-treated for increased durability

For certain body style (a rear cage for example) requires the rear bumper to be removed

CNC Machined Brass Front Upper Arm Mount (Black) Traxxas TRX-4M Mini Crawler Nylon lock nuts secure theON SALE! Note: Not for IFS2 Add more weight to the front of your Trailrunner or Knightrunner and improve its performance on the trails with these CNC Machined Brass upper arm mount.